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A. H. WELLS AND 1. 0.. KELLOGG.

LATHE DRIVE DOG.

APPLICATION FILED FEB- 3, I919.

INVENTOR AmZiZaZZJK Walla ARCI-IIBALD H. TELLS AND JOHN D. KnL oeG, orSEATTLE, wAsH e'ro o LATHE DRIVE-DOG.

Specification of Letters Patent. Patented NOV. 25, 1919.

Application filed February 3, 1919. Serial No. 274,677.

To aZZ whom it may concern:

Be it known that we, AJKGHIBALD H. VVnLLs and JOHN D. KnLLooe, citizensof the United States, at present residing at Seattle, in the county ofKing and State of Washington, have invented certain new and useful Improvements in Lathe Drive-Dogs, of which the following is aspecification.

Our invention relates to certain new and useful improvements in lathedrive dogs especially adapted for use in bolt making and in its generalnature the invention is a modification of our invention disclosed in ourapplication filed January 6, 1919, Serial NO. 269,854.

In that application we disclosed a form of an invention which isespecially adapted for heavy work on large lathes but, in the presentcase, the form disclosed has been especially designed for small work andthe present. invention has for its object to reduce the weight of theparts and reduce the number of bolts necessary to hold the base plate orbracket member to the face of the lathe head plate and still allow forthe necessary adjustment.

In its detailed nature, the invention provides a base plate bracketconsisting of a somewhat Vshaped body having an elongated slot to fitover the lathe center and lie against the lathe head plate to which itis secured by a single bolt passing through the lower end of the body,the body being bent over at right angles at the top to form a. fiat topportion to receive the adjustable jaws.

In its more detailed nature, the invention resides in those novelfeatures of construction, combination and arrangement of parts, all ofwhich will be first fully described and then be specifically pointed outin the appended claims and illustrated in the accompanying drawings, inwhich:

Figure l is a perspective view showing our invention in use.

Fig. 2 is a perspective view of the base bracket member.

Fig. 3 is a perspective view of the finger members or clamps separated.

In the drawing in which like numerals of reference indicate like partsin all of the figures, 1 represents the lathe head plate which is of theusual construction.

The base bracket which constitutes the feature of essential differenceover the construction shown in our copending application, consists of afiat body 3 of triangular form which is provided with a. portion 2 bentat right angles to form a plate extending at right angles to the bodypart 3, the plate 2 having bolt holes 5 through which the bolts 12 maypass, the bolts 12 serving to adjustablysecure the finger members 8 tothe plate 2 through the medium of the bases 6 of the finger members, thesaid bases having slots 7 through which the bolts 12 pass to adjustablysecure the fingers 8 in position to engage the sides of the head 9 ofthe bolt 10.

11 designates the bolt which secures the member 3 to the head plate 1,the bolt pass ing through the opening 4,

In use, the parts are assembled as indicated in Fig. 1, the lathe center13 projecting through the elongated hole 1% in the body 3, the hole 14extending in the horizontal direction of that body so that the same maybe adjusted in one direction, while the members 8 may be adjusted in adirection transversely thereto, thus allowing for such adjustments ofthe fingers 8 as may be necessary to fit difierent size bolt heads, aswill be clear to those skilled in the art.

From the foregoing description taken in connection with the accompanyingdrawings, it is thought the complete construction, operation andadvantages of the invention will be clear to those skilled in the art.

hat we claim is:

l. A lathe drive dog comprising a base plate having bolt holes and thebody portion having an elongated slot through which the lathe center isadapted to project, when the device is in use, said body part having abolt hole through which the same may be secured to the lathe head plate,a pair of finger members, each comprising a longitudinally slotted baseplate adapted to lie in engagement withthe base plate of the base memberand having a finger pendent from one end of the finger base plate, andmeans for clamping the finger plates together to the base plate, allbeing arranged whereby the position of the dog on the head plate may beadjusted in a direction at right angles to the adjustment of the fingermembers with respect to the base plate, said finger members beingindependently adjustable on the base plate, substantially as shown and,

described.

2. As a new article, a lathe dog base memher comprising a body platehaving an elonbers independently secured to said section gated slotadapted tefit onto the face of a for lateral adjustment parallel withrespect lathe head plate with the lathe center proto the plane of thebody member, substan- 10' jecting through the slot, said base membertially as shown and for the purpose dealso including a section extendingat right scribed.

angles to the plane of the body member and AROHIBALD H. WELLS. providedwith bolt holes, and finger mem- JOHN D. KELLOGG.

